This document clarifies, provides and describes the building acoustic properties to be used in a building acoustic data dictionary. Each acoustic property is defined by its attributes as described in EN ISO 23386:2020. The list of building acoustic properties with their attribute definitions is given in the annex of this document. This list provides the essential, needed properties to design and to describe building acoustic performance of common building elements and buildings. These properties are intended to be used as mapping properties for property providers and requesters. The mapping of the identifiers enables the exchange of building acoustic data within different databases.